9990648 has 64 divisors (see below), whose sum is σ = 28972800. Its totient is φ = 3183840.

The previous prime is 9990569. The next prime is 9990653. The reversal of 9990648 is 8460999.

9990648 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×9990648³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3963 + ... + 5973.

It is an arithmetic number, because the mean of its divisors is an integer number (452700).

Almost surely, 2^9990648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9990648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14486400).

9990648 is an abundant number, since it is smaller than the sum of its proper divisors (18982152).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9990648 is a wasteful number, since it uses less digits than its factorization.

9990648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2049 (or 2039 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 9990648 is about 3160.7986332571. The cubic root of 9990648 is about 215.3762871453.

The spelling of 9990648 in words is "nine million, nine hundred ninety thousand, six hundred forty-eight".